Add support for Borough of Broxbourne Council (UK), broxbourne.gov.uk.

[SimonLeigh]

I confirm the .py, .md, README and info.md files have all been updated.

waste_collection_schedule/waste_collection_schedule/test on  adding_broxbourne_gov_uk [!] via 🐍 v3.12.3 (venv) took 4s
❯ python3 test_sources.py -s broxbourne_gov_uk -i -l
Testing source broxbourne_gov_uk ...
No date found for wastetype: Recycling. The date field in the table is empty or corrupted. Failed with error: time data '  ' does not match format '%a %d %B'
No date found for wastetype: Food. The date field in the table is empty or corrupted. Failed with error: time data '  ' does not match format '%a %d %B'
No date found for wastetype: Green Waste. The date field in the table is empty or corrupted. Failed with error: time data '  ' does not match format '%a %d %B'
  found 1 entries for Old School Cottage (Domestic Waste Only)
    2024-05-08 : Domestic [mdi:trash-can]
  found 4 entries for 11 Park Road (All Services)
    2024-05-09 : Recycling [mdi:recycle]
    2024-05-09 : Domestic [mdi:trash-can]
    2024-05-09 : Food [mdi:food-apple]
    2024-05-16 : Green Waste [mdi:leaf]
  found 4 entries for 11 Pulham Avenue (All Services)
    2024-05-08 : Recycling [mdi:recycle]
    2024-05-08 : Domestic [mdi:trash-can]
    2024-05-08 : Food [mdi:food-apple]
    2024-05-15 : Green Waste [mdi:leaf]